I have just had a call from by bank about switching my credit card to a different type. I always pay off the balance so I am not too bothered by the offer of zero % except that my wife does have large balances on her cards. I take it I cannot transfer the balance from somebody elses card. She is a card holder on the account in question but it is a second card to me rather than a joint account, if there is such a thing with credit cards.
Kevin